• Recharge Underground Water Reservoir

Reuse - Recycle - Recharge - Reduce

Re-use Water Discharge from RO System
जल प्रबंधन को ध्यान देने की आवश्यकता है: सामान्य नागरिक से लेकर शासन तक। With rising population and uncertainties in weather patterns, water management needs a critical attention from everybody: ordinary citizen to the governement. We all need to do our bit to address this concern and make the water available to all.

शहरी घरों में पानी बर्बाद होने के तरीकों में से एक: हम सभी डिस्चार्ज पानी को एक छोटे टैंक में स्टोर कर सकते हैं और इसका इस्तेमाल बर्तन साफ ​​करने और कच्ची सब्जियों की सफाई करने के लिए भी कर सकते हैं। One of the way water is wasted in urban households is through discharge from RO-based water purifiers. We all can store the discharge water in a small tank and use it for cleaning utensils and even pre-cleaning of raw vegetables.

Water storage from a RO-purifier

Be aware that the water discharged by the RO-system will certainly be purer than that in overhead tank.
वर्षा जल संचयन शब्दावली - Jargons / Nomenclature in Rainwater Harvesting

Refer this page for similar information about a Rain Water Harvesting (RWH) system.

Area of Roof - छत का क्षेत्रफल: यह जमीन पर परियोजना क्षेत्र (लंबाई x चौड़ाई) को संदर्भित करता है और वास्तविक सतह के क्षेत्रफल को नहीं। - This refers to the project area (length x width) on the ground and not the actual surface area.

औसत वार्षिक वर्षा या वर्षा राशि (वर्षा की दर) - Mean Annual Rainfall or Precipitation Amount (Rate of Rainfall): यह प्रति यूनिट अनुमानित क्षेत्र में औसत बारिश है। - This is the average rain per unit projected area.

Run-off Factor or Run-off Coefficient:आमतौर पर यह उम्मीद की जाती है कि छतों पर गिरने वाले वर्षा जल का 100% एकत्र नहीं किया जा सकता है। - It is generally expected that 100% of rainwater falling on roofs cannot be collected. यह ड्रेन पाइप सिस्टम या बरसाती में अपरिहार्य छोटे रिसावों के कारण होता है - This is due to unavoidable small leakages in the gutter downpipe system or rainfalls which are too light to produce sufficient runoff or यह अत्यधिक बारिश के समय में अतिप्रवाह के कारण है - possible overflow in the case of an extreme downpour. For this reason, it is assumed that only 80~90% of the rainwater can be collected and referred as Run-Off Factor.

जलग्रह - Catchment: The catchment of a water harvesting system is the surface which directly receives the rainfall and provides water to the system. It can be a paved area like a terrace or courtyard of a building or open areas like a lawn or ground. जलग्रहण क्षेत्र वर्षा के संपर्क का पहला बिंदु है। टैंक-आधारित वर्षा जल संचयन प्रणाली के विशाल बहुमत के लिए, जलग्रहण क्षेत्र छत की सतह है। - The catchment area is the first point of contact for rainfall. For the vast majority of tank-based rainwater harvesting systems, the catchment area is the roof surface.

जलाशय - Reservoir: The final storage of rainwater for long-term use!

टंकी - Cistern: The local or temporary storage of water!

संग्रह गटर - Collection Gutter: पाइप की प्रणाली जो छत से गिरने वाले पानी को सिस्टर्न में स्थानांतरित करने के लिए उपयोग की जाती है। - The system of pipes and bends to transfer water falling from roof to the Cistern.

छत की ऊँचाई - Height of Roof: यह निस्पंदन से पहले छत के सबसे निचले बिंदु और पानी के भंडारण टैंक के बीच की ऊर्ध्वाधर दूरी है। - It is the vertical distance between the lowest point of the roof and the water storage tank before filtration.

Coarse mesh: Installed at the roof to prevent the passage of debris.

Filter: A filter is used to remove suspended pollutants such as debris and dirt (silt and clay) from rainwater collected over roof. A filter unit is a chamber filled with filtering media such as fibre, coarse sand and gravel layers clean water before it enters the storage tank or recharge structure. Charcoal is added for additional filtration.


Reference: wgbis.ces.iisc.ernet.in

Type of Roofs


जलाशय का आयतन - Volume of Reservoir

नीचे दी गई तालिका जलाशय की व्यास और ऊंचाई को जलाशय की क्षमता को पूरा करने के लिए एक संदर्भ देती है। निर्माण की ऊँचाई को सामान्यतः नाममात्र व्यास से 10 ~ 20% अधिक माना जाता है। - The table below gives a ready reference to chose a diameter and height of the reservoir to meet a capacity of the reservoir. Construction height is normally assumed 10~20% higher than the nomial diameter.

व्यास - Diameter भरने की ऊँचाई - Nominal Filling Height [m]
[cm] [in] [ft] 1.00 1.25 1.50 1.75 2.00 2.25 2.50
100 39 3.28 7,854 9,817 11,781 13,744 15,708 17,671 19,635
125 49 4.10 12,272 15,340 18,408 21,476 24,544 27,612 30,680
150 59 4.92 17,671 22,089 26,507 30,925 35,343 39,761 44,179
175 69 5.74 24,053 30,066 36,079 42,092 48,106 54,119 60,132
200 79 6.56 31,416 39,270 47,124 54,978 62,832 70,686 78,540
225 89 7.38 39,761 49,701 59,641 69,581 79,522 89,462 99,402
250 98 8.20 49,087 61,359 73,631 85,903 98,175 1,10,447 1,22,718
275 108 9.02 59,396 74,245 89,094 1,03,943 1,18,791 1,33,640 1,48,489
300 118 9.84 70,686 88,357 1,06,029 1,23,700 1,41,372 1,59,043 1,76,715
325 128 10.7 82,958 1,03,697 1,24,437 1,45,176 1,65,915 1,86,655 2,07,394
350 138 11.5 96,211 1,20,264 1,44,317 1,68,370 1,92,423 2,16,475 2,40,528
375 148 12.3 1,10,447 1,38,058 1,65,670 1,93,282 2,20,893 2,48,505 2,76,117
400 157 13.1 1,25,664 1,57,080 1,88,496 2,19,911 2,51,327 2,82,743 3,14,159
425 167 13.9 1,41,863 1,77,328 2,12,794 2,48,259 2,83,725 3,19,191 3,54,656
450 177 14.8 1,59,043 1,98,804 2,38,565 2,78,325 3,18,086 3,57,847 3,97,608
475 187 15.6 1,77,205 2,21,507 2,65,808 3,10,110 3,54,411 3,98,712 4,43,014
500 197 16.4 1,96,350 2,45,437 2,94,524 3,43,612 3,92,699 4,41,786 4,90,874

वर्षा जल संचयन के तरीके - Rainwater Harvesting Methods: Schematic
Some of the rainwater harvesting techniques described in the book Making Water Everybody's Business by Centre of Science and Environment are shown below.

Rainwater harvesting method-01


Rainwater harvesting method-02

Rainwater harvesting method-04

Rainwater harvesting method-03


Bill-of-Material: Rain-water Harvesting System

There are many types of rainwater harvesting (RWH) systems : such as Roof Top Rain Water Harvesting (RTRWH) system, Ground Tank Rain Water Harvesting (GTRWH) system.. Following table summarizes the items (commonly known as Bill-of-Material or BOM) for construction and commissioning of a typical rainwater system. Rainwater harvesting methods are site specific and hence it is difficult to give a generalised cost. As mentioned on webpage "rainwaterharvesting.org/urban/costs.htm" -the residents of Panchsheel Park Colony in Delhi pooled in Rs 4.5 lakh to harvest approx 170 million litres of water annually. Thus, the unit for cost of RWH can be [INR/kilo-Liter/p.a.] which turned out to be INR 3.75 per kilo-liter per annum.
S. No. Description of the Item Unit of Measurement Quantity Required Rate [INR/UOM] Item Cost Remark
01 Plastic Tank: 500 L Pieces 4 1200/- 4800/- 4 tanks to store water
02 Plastic Pipes: 4" diameter meters 75 130/- 9750/- Conduits to collect water from roof to tank
03 Bricks Thousands 2 5000/- 10000/- For underground Filtration Tank
04 Cement Bags 10 500/- 5000/- For underground Filtration Tank
05 Sand ft3 500 10/- 5000/- For underground Filtration Tank
06 Sand ft3 200 20/- 4000/- Water filtration layer - 1
07 Plastic net m2 10 50/- 500/- Water filtration layer - 2
08 Plastic U-Bend Pieces 10 50/- 500/- For water collection system
08 PVC Pipe Bend Pieces 10 50/- 500/- For water collection system
The costs of a RWH system would be comparatively significantly less if the system is incorporated during the construction of the building itself.
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